90421959 has 8 divisors (see below), whose sum is σ = 120850672. Its totient is φ = 60137280.

The previous prime is 90421957. The next prime is 90421973. The reversal of 90421959 is 95912409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90421959 - 2¹ = 90421957 is a prime.

It is a super-2 number, since 2×90421959² = 16352261338795362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90421951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34534 + ... + 37059.

It is an arithmetic number, because the mean of its divisors is an integer number (15106334).

Almost surely, 2^90421959 is an apocalyptic number.

90421959 is a deficient number, since it is larger than the sum of its proper divisors (30428713).

90421959 is a wasteful number, since it uses less digits than its factorization.

90421959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72017.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 90421959 is about 9509.0461666773. The cubic root of 90421959 is about 448.8397418822.

The spelling of 90421959 in words is "ninety million, four hundred twenty-one thousand, nine hundred fifty-nine".